JPH02133257A - Sideward object visual check device for vehicle - Google Patents

Abstract

PURPOSE:To surely confirm the other object of automobile or the like, positioned in a side part, by a driver left as fixing his eyes to the front by forming a reflection type hologram on a front glass of the automobile. CONSTITUTION:In case of using natural light as a source of light, reflecting light (scattering light) from an adjacent automobile B is incident upon a point P on a reflection type hologram 15 formed on a front glass 17 of an automobile A. This incident light is analyzed by the reflection type hologram 15 forming an image in a position S of front distance L. While in case of utilizing a direction indicator 22 in the front part of a car body as the source of light, by additionally providing a permeating type hologram 25 in a side glass, flickering light in the position S of the front distance L can be seen by a driver D, thus he can recognize presence of the automobile B positioned aside without displacing the eyes during driving.

Description

[Detailed Description of the Invention] [Required 4] Relating to a visual recognition device that optically confirms the presence or absence of side objects in a vehicle, particularly an automobile, the driver can reliably check the side of the automobile while keeping his/her eyes fixed on the front. The purpose of this device is to provide a device that can confirm objects such as other cars located at the driver's side, and uses a reflection hologram that displays the presence or absence of side objects on the driver's line of sight superimposed on the front view. It is configured to be installed in the vehicle main body portion in front of the driver.

[Industrial application field]

TECHNICAL FIELD The present invention relates to a visual recognition device in a vehicle such as an automobile that allows a driver to reliably visually recognize an object such as another vehicle located on the side of the vehicle.

BACKGROUND ART In recent years, as automobiles have become widespread in society, interest has been focused on their safety. One example of this is the prevention of traffic accidents when turning left or right or changing lanes, and various research and developments are being conducted for this purpose. The present invention particularly provides a side object visual recognition device for a vehicle that can make a significant contribution to preventing such accidents.

[Conventional technology]

When turning left or right or changing lanes, a driver indicates his/her intention using a turn signal and also monitors the presence of a car or two-wheeled vehicle behind him on the left or right using side mirrors.

[Problem to be solved by the invention]

Objects such as cars (including people, bicycles, motorcycles, etc.) lined up almost directly next to the vehicle when turning left or right or changing lanes.
It has been pointed out that the problem is that it is difficult to notice.

In fact, as shown in FIG. 12, this area tends to become a blind spot, which causes major accidents involving pedestrians, motorcyclists, etc. when turning left or right. In FIG. 12, if your car is A1 and another car running to the left is B, the lane area becomes the driver's blind spot and is not visible in the side mirror.

In addition, particularly in the case of cars equipped with door mirrors, which have become popular in recent years, the blind spot area becomes even wider, and the driver has to shift his/her line of sight considerably in order to check the car behind, which increases the risk.

An object of the present invention is to provide an apparatus that eliminates such a blind spot area and can reliably confirm even a side object located almost directly to the side.

Another object of the present invention is to enable a driver to reliably check for other vehicles without shifting his or her line of sight from the front.

[Means to solve the problem]

In order to achieve the above object, the vehicle side object visibility device according to the present invention displays a reflection hologram that displays the presence or absence of a side object on the driver's line of sight superimposed on the front view. The main feature of the structure is that it is provided in the main body of the vehicle in front of the driver.

A reflection hologram is formed by overlapping a plurality of reflection holograms with different diffraction characteristics or by arranging a plurality of reflection holograms with different diffraction characteristics in a predetermined pattern in the same plane.

If the vehicle is a car, the reflection hologram can be formed on the windshield of the car.

It is also possible to provide a transmission hologram on the side of the vehicle body that guides reflected light from a side object to the reflection hologram.

Similarly, a reflecting mirror may be provided on the vehicle body to guide reflected light from a side object to a reflective hologram.

Preferably, a light source for illuminating side objects can be provided on the vehicle body, but it is also possible to use the existing turn signal of the vehicle as this light source.

[For production]

As shown in FIG. 1, light emitted from an appropriate light source 11
(corresponding to other car B) and is reflected at a wavelength λ1, which varies depending on the color of the object. The light of λ2... is incident on a point P on the reflection hologram 15.

As a result, the reflected light from object 0 is reflected by the reflection hologram 15.
It is diffracted by the beam and focuses an image at a distance in front of it. Therefore, as shown in FIG. 2A, for example, the reflection hologram 15 is
Each has a specific wavelength λ1. If the design is made so that only the light of λ2... is diffracted, virtually all of the reflected light from the object 0 will be imaged (virtual image) at a distance S, and as a result,
The observer (driver) can know the existence of object 0 beside him while facing forward. As the reflection hologram 15, as shown in FIG. 2A, a plurality of holograms H2, H2, H3. They may be combined and arranged in the same plane in a predetermined pattern. still,
In the case of a pattern arrangement such as that shown in FIG. 2B, the observer will see a checkered image. Further, since the vehicle has reflected light from sunlight and road lighting, the light source 11 is not necessarily required, but it is preferable to provide a dedicated light source as in the embodiment described later, or to install an existing direction indicator. Use as a light source.

〔Example〕

FIG. 3 shows a first embodiment of the invention.

In FIG. 3, natural light is used as the light source. Reflected light (scattered light) from the adjacent car B enters a point P on the reflection hologram 15 formed on or inside the windshield 17 of the car A.

This incident light is diffracted by the reflection hologram 15 and focuses an image at a position S at a distance in front of the windshield 17.

As a result, the driver of car A remains facing forward.
That is, the presence of car B located next to the user can be visually recognized without shifting the line of sight.

FIG. 4 shows an embodiment completely similar to FIG. 3, but whereas FIG. 3 shows the case of a right turn, FIG. 4 shows the case of a left turn. That is, the only difference between FIG. 3 and FIG. 4 is the left and right positions of cars A and B.

Figure 5.6 shows a further embodiment of the invention.

In the same figure, the direction indicator 22 at the front of the vehicle body is used as a light source.
is used. The formation of the reflection hologram 15 on the windshield 17 of the automobile is the same as in the embodiment shown in FIG. 3.4. However, the embodiment shown in FIG. 5.6 is characterized in that a transmission hologram 25 is attached to the side of the vehicle body, for example, on the side glass. FIG. 5 shows the case of right turn, and FIG. 6 shows the case of left turn. In the case of a right turn (Fig. 5), when car A flashes the direction indicator 22 in front of the right, the light will be reflected by car B if there is one on the right side, and the light will be reflected by car A's side glass (transparent hologram). 25). The transmission hologram 2-5 is designed in advance to diffract incident light at a certain angle θ. That is, the diffracted light is converged on the point P of the reflection hologram 15. As a result, the driver can see a flashing light (image) at a position S at a distance in front of the windshield 17, similar to the previous embodiment. In this way, the driver can watch the car B located next to him without shifting his line of sight while driving.
can recognize the existence of

In the case of a left turn as shown in FIG. 6, the left front direction indicator 22 of the automobile A flashes, and the flashing image is captured at a position S at a distance in front of the windshield 17, just as in the case of FIG. It will be done. In FIG. 6, the diffraction angle of the transmission hologram 25 is not necessarily equal to that in FIG. 5, so it is indicated by θ. The reflection hologram 15 formed on the windshield 17 in order to obtain information on the presence of other vehicles from both the left and right sides is formed in two layers, and is diffracted by different holograms H+ and H2 in the case of a right turn and the case of a left turn. Focus on S.

A dedicated light source 30 may be provided separately from the direction indicator 22. In this case, the light source 30 is provided at an appropriate position on the vehicle body, but as shown in FIG. 7, the light source 30 may be provided, for example, on the front side of the vehicle body. Except for the provision of a light source 30, the operation and effect of the embodiment shown in FIG. 7 are similar to those of the embodiment shown in FIG.

FIG. 8 shows a case where the light source 30 is provided at the rear of the vehicle body (it is of course possible to use the rear direction indicator 22 as a light source, but the illustration is omitted), while FIG. 9 shows the same. 2 shows a case where a direction indicator 22 or a dedicated light source (not shown) at the rear of the vehicle body of a car A is used as a light source, and a transmission hologram 25 is attached to the side glass.

In other words, Figure 8 becomes Figure 3.4, and Figure 9 becomes Figure 5.6.
．． Each corresponds to Figure 7. In addition, the diffraction angle of the transmission hologram 25 in FIG. 9 is assumed to be θr.

FIG. 10.11 shows an embodiment in which a reflection mirror 35 is used instead of the transmission hologram 25. The reflective mirror 35 is fixed to the ceiling of the automobile A, for example. FIG. 10 shows the case where the front direction indicator 22 is used with the light source, and FIG. 11 shows the case where the rear direction indicator 22 is used. Note that in these embodiments, although not particularly shown in the drawings, it is of course possible to use a dedicated light source in place of the direction indicator as described above. Further, the mounting position of the reflecting mirror is appropriately set depending on the position of the driver and the like. In the embodiment shown in FIG. 10.11 as well, the light from the light source 22 is reflected by the vehicle, and the reflected light is reflected by the reflective mirror 35 toward the point P of the reflective hologram 15.

Although the embodiments shown in FIGS. 8 to 11 have been described only for right turns, it will be easily understood that the same symmetrical arrangement may be used for left turns.

Further, the idea of the present invention itself is applicable not only to automobiles but also to motorcycles, bicycles, and other vehicles in general.

〔Effect of the invention〕

As described above, according to the present invention, with an extremely simple configuration, it is possible to keep facing forward when turning left or right or changing lanes.
It is possible to visually detect the presence of other vehicles next to the vehicle by superimposing it on the scenery in front of the vehicle, making it possible to prevent accidents involving vehicles or collisions, which greatly contributes to safety.

[Brief Description of the Drawings] Fig. 1 is a diagram explaining the basic principle and operation of the device according to the present invention, and Figs. 2A and 2B show two examples of arrangement structures of reflection holograms used in the present invention. Figures 3 and 4 are views showing the first embodiment of the present invention (Figure 3 is for a right turn, Figure 4 is for a left turn), and Figures 5 and 6 are diagrams showing a first embodiment of the present invention. FIG. 7 is a diagram showing still another embodiment of the present invention (when a light source is attached); FIG. The figure shows an embodiment in which a light source is attached to the rear of the car body, Figure 9 shows an example in which a transmission hologram is added to the side of the car body in addition to the embodiment shown in Figure 8, and Figure 1O shows a reflection mirror. Figure 11 shows an example in which the light source is located at the rear of the vehicle body.
FIG. 12, which is similar to the previous figure, is a diagram showing problems in the conventional technology. 15...Reflection hologram, 17...Windshield, 25...Transmission hologram, 35...Reflection mirror Principle of the present invention When turning right When turning left When turning right Fig. 5 When turning left Fig. When one light source is installed in a part of a car System 7JJ

Claims (1)

[Claims] 1. A reflection hologram (15) that displays the presence or absence of a side object on the driver's line of sight superimposed on the front view is provided on the vehicle main body portion (17) in front of the driver. A side object visual recognition device for a vehicle characterized by the following. 2. The visual recognition device according to claim 1, wherein the reflection hologram (15) is formed by overlapping a plurality of reflection holograms (H_1, H_2, . . . ) having different diffraction characteristics. 3. The above-mentioned reflection hologram (15) is formed by arranging a plurality of reflection holograms (H_1, H_2...) having different diffraction characteristics in a predetermined pattern in the same plane. The visual recognition device according to item 1. 4. The visual recognition device according to claim 1, wherein the vehicle is an automobile, and the reflective hologram is formed on a windshield (17) of the automobile. 5. The visual recognition device according to claim 4, further comprising a transmission hologram (25) provided on a side surface of the vehicle body for guiding reflected light from a side object to a reflection hologram. 6. The visual recognition device according to claim 4, wherein the vehicle body is provided with a reflection mirror (35) that guides reflected light from a side object to a reflection type hologram. 7. A light source (22,
The visual recognition device according to claim 1, further comprising: 30). 8. Visual recognition device according to claim 4, characterized in that the light source is formed by an existing direction indicator (22) of the motor vehicle.